steong



(No Model.)

G. W. 8v W. L. STRONG.

. Y AMALGAMATOR. No. 278,059. Patented Mey 22,1883.

. UNITED STATES 1 PATENT. OFFICE,

GEORGE YV. STRONG AND WALTER L. STRONG, OF SAN FRANCISCO, OAL.

AMALGAMATOR.

.SPECIFICATION forming part of Letters Patent No. 278,059, dated May 22, 1883.

Y Application filed March 13, 1883. (No model.)

To all whom it may concern:

Be it known that we, GEORGE W. STRONG and WALTER L. STRONG,-of San Francisco, county of San Francisco, State of California, have invented an Improved Amalgamator; and we hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to an improved device for working ores and amalgamating the precious metals contained therein; and it consists, mainly, ot'a pan of novel construction, by which a circulation of the pulp is-kept up when the muller is in motion, and, in combination with this pan, of a muller for grinding and agitating or circulating the pulp within the pan, as will be more fully explained by reference to the accompanying drawings, in whichl Figure l is a view of our pan. Fig. 2 is a vertical section through the central vertical shaft, showing the interior of the pan and the muller. Fig. 3 is a' top view ot the muller with shoes attached. Fi g. 4 is a section through the corners of the pan. Fig. 5 is a view of one of the shoes.

In the construction of pans for the purpose of amalgamating and grinding ores which have been partially reduced by stamps or other pulverizing appliances it is necessary to keep up a constant circulation ot' the pulp, so that all parts may continually pass beneath the muller and the grinding-shoes, so that it may be properly reduced and amalgamated, and this circulation is usually produced by means of wings or other attachments within the pan bywhich to return the pulp to the center above or below the mullers. r

In our invention `we produce a very perfect and constant circulation by means of the anglesformed by the shape of the pan within which the muller and vertical driving-shaft revolve. i

A is our pan, the upper part ot' which is i made square in horizontal section, and it maybe slightly smaller at `the bottom than at the top, for more perfect action, although the operation may also be carried on in a pan with "vertical sides. Through the center of the pan a hollow core or sleeve, 13,'projects upward from the bottom, nearly or quite level with the top 5o of thel pau. The vertical shaft C projects up through this core and is driven by a bevelgear below from the main shaft in the usual manner. A yoke, I), iskeyed upon this shaft at the top, and .its lower ends are tixed to a muller, E, which is fitted to rotate nca-r the bottom of the pan.

In the present case we have shown our muller as made with four arms, each having a perforation, through which a lug from a grinding- 6o shoe, F, may pass and be keyed by a wooden plug or in other suitable manner. We prefer to secure the shoes so that their front edges stand at an angle forward of a radial line drawn through the inner corners; but they m-ay also 6 5 be secured iu other ways and will produce good results.

When the muller is set in motion, the pan being charged with pulp from the battery or crusher, the current will ow radially out- 7o ward until it strikes the corners of the pan, where it will be arrested and thrown back upon itself from above, passing down the center and beneath the muller and grinding-shoes. In order to produce the most perfect circula- 7 5 tion, thelower corners of the pan are cut inward at an incline so as to make faces G, as shown. This gives the bottom an outline nearly or quite octagonal with the sides G, sloping upward from it, so that when the pulp 8o flows out from beneath the shoes it strikes these faces and is thrown upward, so that there will be a strong downward current at the center, while the external current is upward. rIhe angles of the pan interrupt the 8 5 rotary and centrifugal currents and throw them back toward the center at the top, and this produces aconstant and rapid circulation of the pulp, which is thus compelled to pass constantly beneath the shoes until every part 9o has been subjected to a thorough grinding action and also contact with the mercury which is contained within the pan.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. An amalgamating-pan having the upper part square in horizontal section, and the inclinedfaces G extending upward from the In witness whereof we hereuntoAv set our bottom at the angles, substantially as herein hands. described.

2. A grinding and anmlgamating pan made 5 square iu outline, and having the inclined faces G ab the lower corners, in combination Titnessesz with the revolving muller and the Shoes, sub- F. C. MOSEBACH, n stantally as herein described. P. MCARAN.

GEORGE W. STRONG. WALTER L. STRONG. 

